Many of the eyeplates, for instance, have bits that hang down below nose level. When you look at them head on in the character creator those bits that are below a certain level are skewed to the side such that pieces on the right side of the character's face stick slightly off of it and pieces on the left side stick into the face (and pieces in the middle just look weird).

There's an armored chin piece that's basically like having a long metal goatee, and if you put that piece on and then put on various side accessories such as the Mech Wing you'll notice that the bits of the side accessory that jut out around the mouth are quite crooked in relation to the chin piece. I think the chin piece is straight and those side pieces are crooked. However, one of the metal pieces that fits over the jaw and mouth has a clear skew in it on the characte's right side so it's hard to say for certain which is messed up.